`react-doctor/remotion-no-css-url-assets`

CSS URL asset can flicker in Remotion

Category: Bugs
Severity: error
Source: oxlint-plugin-react-doctor
Framework: global
Enabled when: remotion:4
Tags: react-jsx-only
Default: Enabled

Validate the diagnostic

Confirm the reported code matches this rule before you edit it.

Confirm the reported code matches react-doctor/remotion-no-css-url-assets. Compare it with the Before example and verify the same API, framework, and execution context. Treat it as a false positive only when one of those conditions differs.

Compare the code

The corrected pattern shows a focused way to address the diagnostic.

Reported pattern

import { AbsoluteFill, useCurrentFrame } from "remotion";

const Scene = () => {
  useCurrentFrame();
  return (
    <AbsoluteFill
      style={{
        backgroundImage: 'url("/hero.png")',
      }}
    />
  );
};

Corrected pattern

import {
  AbsoluteFill,
  Img,
  staticFile,
  useCurrentFrame,
} from "remotion";

const Scene = () => {
  useCurrentFrame();
  return (
    <AbsoluteFill>
      <Img
        src={staticFile("hero.png")}
        style={{ height: "100%", objectFit: "cover", width: "100%" }}
      />
    </AbsoluteFill>
  );
};

How to fix

Use the corrected pattern as a reference. Preserve behavior that the rule does not require you to change.

Copyable fix prompt

Copy this self-contained prompt into your coding agent after you confirm the diagnostic.

Fix every confirmed react-doctor/remotion-no-css-url-assets diagnostic in the current repository. Required change: - Render the asset with Img inside an AbsoluteFill, or preload the same source with a hidden Img when a CSS mask is required.

Reference transformation:Before:

import { AbsoluteFill, useCurrentFrame } from "remotion";

const Scene = () => {
  useCurrentFrame();
  return (
    <AbsoluteFill
      style={{
        backgroundImage: 'url("/hero.png")',
      }}
    />
  );
};

After:

import {
  AbsoluteFill,
  Img,
  staticFile,
  useCurrentFrame,
} from "remotion";

const Scene = () => {
  useCurrentFrame();
  return (
    <AbsoluteFill>
      <Img
        src={staticFile("hero.png")}
        style={{ height: "100%", objectFit: "cover", width: "100%" }}
      />
    </AbsoluteFill>
  );
};

Constraints: - Confirm the reported code matches the Before pattern. - Make the smallest change that fixes the root cause. - Preserve behavior and interfaces unrelated to this diagnostic. - Reuse existing project components, utilities, and conventions. - Do not introduce render-phase side effects, render-phase state updates, or Hooks rule violations. - Adapt identifiers and framework details instead of copying blindly. - Do not disable the rule or suppress matching code. - Confirm this rule is enabled for the project: remotion:4. Verification: - Run focused tests for the changed behavior. - Run React Doctor and confirm this diagnostic no longer appears. - Report the files changed and any checks you could not run.

More Bugs rules from the rules reference:

react-doctor/remotion-no-module-scope-delay-render: Module-scoped delayRender blocks every composition
react-doctor/remotion-no-native-media-elements: Native media element bypasses Remotion loading
react-doctor/remotion-no-next-image: Next.js Image can flicker in Remotion
react-doctor/remotion-stable-delay-render-handle: delayRender handle is recreated during render
react-doctor/rendering-conditional-render: Change to `{items.length > 0 && <List />}` or use a ternary: `{items.length ? <List /> : null}`

react-doctor/remotion-no-css-url-assets